GB2263142A - Improvements in or relating to transmissions of the toroidal-race,rolling-traction type - Google Patents

Improvements in or relating to transmissions of the toroidal-race,rolling-traction type

Info

Publication number
GB2263142A
GB2263142A GB9301084A GB9301084A GB2263142A GB 2263142 A GB2263142 A GB 2263142A GB 9301084 A GB9301084 A GB 9301084A GB 9301084 A GB9301084 A GB 9301084A GB 2263142 A GB2263142 A GB 2263142A
Authority
GB
United Kingdom
Prior art keywords
toroidal
regimes
speed
output
race
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9301084A
Other versions
GB2263142B (en
GB9301084D0 (en
Inventor
Thomas George Fellows
Geoffrey Bernard Soar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Torotrak Development Ltd
Torotrak PLC
Original Assignee
Torotrak Development Ltd
Torotrak PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB909018082A external-priority patent/GB9018082D0/en
Application filed by Torotrak Development Ltd, Torotrak PLC filed Critical Torotrak Development Ltd
Priority to GB9301084A priority Critical patent/GB2263142B/en
Publication of GB9301084D0 publication Critical patent/GB9301084D0/en
Publication of GB2263142A publication Critical patent/GB2263142A/en
Application granted granted Critical
Publication of GB2263142B publication Critical patent/GB2263142B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F16H2015/383—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces with two or more sets of toroid gearings arranged in parallel

Abstract

A continuously-variable-ratio transmission with coaxial input (from 6) and output (17), capable of operating in a least two regimes, and comprising in succession a variator (2) of the toroidal-race rolling-traction type, and gearing including both a speed-reducing unit (10) and an epicyclic mixing gear unit (15) in which the components of the mixing gear unit are locked-up in at least one of the regimes, and in which the speed-reducing unit (10) effects its speed-reduction without reversal of the direction of rotation between its input (1) and output (from 26). The operating axis (5) of the variator (2) may either coincide with the coaxial input and output of the transmission (Figure 2), or be parallel to but displaced from it (Figure 3). In addition to a brake (13) and clutch (20), operable to engage first and second regimes, a further clutch (48) operable to engage a third regime is shown.
GB9301084A 1990-08-17 1993-01-20 Improvements in or relating to transmissions of the toroidal-race,rolling-traction type Expired - Fee Related GB2263142B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9301084A GB2263142B (en) 1990-08-17 1993-01-20 Improvements in or relating to transmissions of the toroidal-race,rolling-traction type

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909018082A GB9018082D0 (en) 1990-08-17 1990-08-17 Improvements in or relating to transmissions of the toroidal-race,rolling-traction type
PCT/GB1991/001382 WO1992003671A1 (en) 1990-08-17 1991-08-14 Improvements in or relating to transmissions of the toroidal-race, rolling-traction type
GB9301084A GB2263142B (en) 1990-08-17 1993-01-20 Improvements in or relating to transmissions of the toroidal-race,rolling-traction type

Publications (3)

Publication Number Publication Date
GB9301084D0 GB9301084D0 (en) 1993-03-24
GB2263142A true GB2263142A (en) 1993-07-14
GB2263142B GB2263142B (en) 1994-03-30

Family

ID=26297520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9301084A Expired - Fee Related GB2263142B (en) 1990-08-17 1993-01-20 Improvements in or relating to transmissions of the toroidal-race,rolling-traction type

Country Status (1)

Country Link
GB (1) GB2263142B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2336880A (en) * 1998-04-20 1999-11-03 Lin Pan Chien Power transmission apparatus
GB2471859A (en) * 2009-07-15 2011-01-19 Alvan Burgess Transmission comprising an infinitely variable drive and a differential

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158411A1 (en) * 1984-02-07 1985-10-16 Torotrak (Development) Limited Driveline for a track-laying vehicle
EP0177241A2 (en) * 1984-09-28 1986-04-09 Torotrak (Development) Limited Continuously variable transmission
EP0185463A1 (en) * 1984-11-26 1986-06-25 Torotrak (Development) Limited Continuously variable transmission
EP0306272A1 (en) * 1987-09-02 1989-03-08 Torotrak (Development) Limited Continuously variable transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158411A1 (en) * 1984-02-07 1985-10-16 Torotrak (Development) Limited Driveline for a track-laying vehicle
EP0177241A2 (en) * 1984-09-28 1986-04-09 Torotrak (Development) Limited Continuously variable transmission
EP0185463A1 (en) * 1984-11-26 1986-06-25 Torotrak (Development) Limited Continuously variable transmission
EP0306272A1 (en) * 1987-09-02 1989-03-08 Torotrak (Development) Limited Continuously variable transmission

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2336880A (en) * 1998-04-20 1999-11-03 Lin Pan Chien Power transmission apparatus
GB2336880B (en) * 1998-04-20 2001-11-21 Lin Pan Chien Power transmission apparatus
GB2471859A (en) * 2009-07-15 2011-01-19 Alvan Burgess Transmission comprising an infinitely variable drive and a differential

Also Published As

Publication number Publication date
GB2263142B (en) 1994-03-30
GB9301084D0 (en) 1993-03-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020814